Move-away Arrow Rest Dynamics for Fletching Clearance
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Solution Overview
Problem
Conventional arrow rests fail to securely hold an arrow shaft when the archery bow is tilted or moved, leading to potential arrow shaft displacement during discharge.
Innovation Solution
An arrow rest with moveable arms that transition between a load position and a discharge position, utilizing an actuator and bias elements to ensure the arrow shaft remains secured during launching, even when the bow is tilted or moved, by moving away from the arrow shaft to provide clearance for fletching and steering devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional arrow rests use fixed support elements to hold the arrow shaft, then the arrow shaft is securely held in most positions, but the arrow shaft cannot be properly cleared during discharge due to lack of movement
Solution Approach 1:
The arrow rest employs pivotally mounted support elements that can rotate between a loaded position (contacting the arrow shaft) and a discharged position (clearing the fletching). This dynamic movement allows the same structure to provide secure retention during loading and adequate clearance during discharge, resolving the contradiction between these two requirements.
2Ease of operation
If arrow rest arms move away from the arrow shaft during discharge, then clearance is provided for fletching, but the arrow shaft may fall away when the bow is tilted or moved
Solution Approach 1:
The support elements are designed to pivot dynamically based on bow position. When the bow is in a stable shooting position, the arms pivot away to clear the fletching. When the bow is tilted or moved, the arms pivot back to contact the arrow shaft, providing retention. This dynamic adaptation resolves the contradiction between clearance and retention.
Solution Approach 2:
The arrow rest incorporates a detector assembly that senses the bow's position (cocked vs. released) and automatically actuates the cam assembly to move the support elements. This feedback mechanism ensures the arms are in the correct position based on real-time bow state, maintaining both clearance and retention as needed.
3Ease of operation
If spring mechanisms are used to move support elements away from the arrow shaft, then automatic clearance is achieved, but additional components increase device complexity
Solution Approach 1:
The spring mechanisms automatically actuate the cam assembly and support elements without requiring external control systems. The system uses the natural energy storage and release of springs to achieve automatic movement based on bow position, eliminating the need for complex electronic controls or additional actuation mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents the arrow shaft from falling away by ensuring the arms maintain contact and provide necessary clearance during discharge, ensuring reliable arrow launching and stability across various bow positions.
Implementation Method 1
Any suitable bias element, such as a coil spring, a leaf spring, a compression spring, a tension spring and/or any other suitable mechanical element having a bias force, can be used to normally urge one or more components of this invention into the load position and/or the discharge position.
Data Source
AI summary
An arrow rest that moves away from a shaft, such as an arrow shaft or a bolt shaft, when the shaft is discharged from a bow, such as an archery bow or a crossbow. An actuator moves between the load position and the discharge position. During movement of the actuator, one or more arms supporting and/or guiding the shaft move away from the shaft, such as to provide clearance for the shaft and/or any corresponding vanes, fletching and/or steering devices.